2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Nitriding yog ib qho zoo heev ntawm kev tswj corrosion, nrog rau hnav thiab qaug zog, hauv cov hlau.
Lub hom phiaj ntawm nitriding yog dab tsi?
Lub hom phiaj tseem ceeb ntawm nitriding yog nce qhov tawv tawv ntawm cov khoom, nrog rau nws hnav tsis kam, qaug zog lub neej, thiab corrosion kuj [30], uas tau ua tiav los ntawm lub xub ntiag ntawm nitrided txheej.
Yuav dub nitride xeb?
A dub nitride nto yog corrosion resistant, nws tsis corrode hauv qab li chroming los yog xeb los ntawm parkerizing ua thiab yog check heev.
Nitrided steel nyuaj npaum li cas?
Lub hardness ntawm nitrided txheej tuaj yeem siab dua qhov ua tiav los ntawm carburising thiab nyob rau hauv thaj tsam ntawm 800–1200 HV.
Qhov txawv ntawm nitriding thiab Nitrocarburizing yog dab tsi?
Nitriding yog siv rau ferrous, titanium, aluminium, thiab molybdenum alloys, thiab feem ntau yog siv rau cov hlau tsis tshua muaj carbon, low-alloy steels. Nitrocarburizing tsuas yog siv rau ntawm ferrous alloys. Lawv txhim kho cov khoom nto ntawm cov khoom hlau thiab cov cuab yeej xws li scuff thiab corrosion kuj, thiab nce lub zog qaug zog.
Pom zoo:
Cov tshuaj tiv thaiv puas muaj kev tiv thaiv?
Cov tshuaj tiv thaiv COVID-19 txhawb koj lub cev tiv thaiv kab mob li cas? Cov tshuaj tiv thaiv ua haujlwm los ntawm kev txhawb koj lub cev tiv thaiv kab mob los tsim cov tshuaj tiv thaiv, raws nraim li nws xav tau yog tias koj yog raug tus kab mob.
Cov tshuaj tiv thaiv tam sim no puas tiv thaiv kab mob sib txawv?
2) qhov sib txawv tam sim no yog qhov sib txawv tshaj plaws ntawm COVID-19. Nws yog ze li ob zaug kis tau tus kab mob ua ntej thiab yuav ua rau mob hnyav dua. Txawm hais tias kev tshawb fawb qhia tias cov tshuaj tiv thaiv COVID-19 tsis tshua muaj txiaj ntsig zoo rau qhov sib txawv, cov tshuaj tiv thaiv tseem zoo li muab kev tiv thaiv COVID-19 hnyav.
Puas yog kev tiv thaiv kev tiv thaiv tsis sib txawv ntawm tus kheej?
Peb xav tias lub cev tiv thaiv kab mob ua tiav kev ntxub ntxaug tus kheej tsis yog tus kheej, thaum hloov pauv kev tiv thaiv, tsis yog los ntawm kev lees paub qhov sib txawv ntawm tus kheej thiab txawv teb chaws antigens, tab sis los ntawm kev pom qhov avidity ntawm T cell activation.
Puas yog lub cev tiv thaiv kab mob hauv lub cev puas tsim cov tshuaj tiv thaiv?
Lub cev tiv thaiv kab mob tau txais, nrog kev pab los ntawm lub cev hauv lub cev, tsim cov hlwb (tshuaj tiv thaiv kab mob) los tiv thaiv koj lub cev los ntawm ib tus neeg invader tshwj xeeb. Cov tshuaj tiv thaiv no yog tsim los ntawm cov hlwb hu ua B lymphocytes tom qab lub cev tau raug rau cov neeg ua phem.
Puas yog kev tiv thaiv kev tiv thaiv?
Cov txheej txheem tiv thaiv yog tus cwj pwm tib neeg siv cais lawv tus kheej ntawm cov xwm txheej tsis zoo, kev ua, lossis kev xav. Cov tswv yim kev puas siab puas ntsws no yuav pab tau tib neeg kom nyob deb ntawm lawv tus kheej thiab kev hem lossis kev xav tsis zoo, xws li kev ua txhaum lossis kev txaj muag.
